a person who spoils the joy or pleasure of others; spoilsport.

Origin of kill-joy

First recorded in 1770–80 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for killjoy

pessimist, complainer, grouch, whiner, dampener, doomsdayer, grinch

Examples from the Web for killjoy

Contemporary Examples of killjoy

  • Not to be a killjoy fact-checker, but this does seem like an important detail to get right.

    The Daily Beast logo
    Jesus Christ, Baby Daddy?

    Candida Moss

    November 12, 2014

Historical Examples of killjoy

British Dictionary definitions for killjoy



a person who spoils other people's pleasure
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for killjoy

also kill-joy, 1776, from kill (v.) + joy. Formerly used with other stems (cf. kill-courtesy "boorish person," kill-cow "bully, big man," etc.).

Online Etymology Dictionary, © 2010 Douglas Harper